The electrocatalyst interface engineering field is in a growth stage, with annual filings rising sharply and a corpus of 70 patent families concentrated around a small set of energy-company and academic filers led by REPSOL SA. India is the dominant filing jurisdiction, and electrolytic compound production (C25B) anchors the technology mix, but adjacent branches in semiconductor devices and inorganic compounds remain comparatively under-served.
REPSOL SA holds the top position in the applicant ranking, followed by the Council of Scientific and Industrial Research and Enagas Services Solutions, with King Fahd University of Petroleum and Minerals tied at the same count. The top five filers account for 35% of the combined total across the hundred largest filers, signaling a moderately concentrated but still-contested competitive structure.
A clear tier gap separates the top two applicants from the rest. Below the top four, counts drop to three or fewer patent records per filer, and the long tail is populated almost entirely by academic and public-sector research institutions — predominantly Indian universities and institutes.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | REPSOL SA | 10 | |
| 2 | COUNCIL OF SCI & IND RES | 7 | |
| 3 | Enagas Services Solutions S.L.U. | 6 | |
| 4 | King Fahd University of Petroleum and Minerals | 6 | |
| 5 | National Institute of Technology Warangal | 3 | |
| 6 | National Research Council of Canada | 3 | |
| 7 | Indian Institute of Technology Madras | 2 | |
| 8 | Indian Oil Corporation Ltd | 2 | |
| 9 | Oronzio De Nora Impianti Elettrochimici S.p.A. | 2 | |
| 10 | Christ University | 2 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | Bharathiar University | 2 | |
| 12 | Indian Institute of Technology Bombay | 2 | |
| 13 | SAVEETHA INST OF MEDICAL & TECH SCI | 1 | |
| 14 | Navajsharif Shamshuddin Shaikh | 1 | |
| 15 | Indian Institute of Technology | 1 | |
| 16 | Dalian Institute of Chemical Physics, Chinese Academy of Sciences | 1 | |
| 17 | SRM INST OF SCI & TECH | 1 | |
| 18 | Soochow University | 1 | |
| 19 | SHAANXI UNIV OF SCI & TECH | 1 | |
| 20 | PetroChina Co Ltd | 1 |
REPSOL SA's lead, combined with its focus on electrolytic production processes and semiconductor device integration (C25B and H01L), suggests that industrial electrolysis applications are the commercial anchor of this field. The academic tier's concentration in catalysis and battery/fuel-cell branches (B01J and H01M) points to foundational research feeding the next generation of interface designs.
The most recent 18–24 months of filings are likely under-counted due to patent publication lag; actual activity in 2025–2026 is expected to be higher than current records indicate. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
The annual filing trend reveals a field that has moved from near-zero activity to a sharp upward trajectory over roughly five years. The technology composition chart shows electrolytic compound production (C25B) as the dominant branch, with catalysis, batteries, and nanotechnology forming a secondary cluster.
Filings were negligible through 2020, then accelerated, reaching multi-year growth of 517% over the recent window. Counts for 2025 and 2026 are suppressed by publication lag and should be read as floor estimates, not peaks.
↗ Hover for values · click a bar to ask EurekaC25B (electrolytic production of compounds) dominates the IPC distribution, reflecting the field's core focus on electrochemical synthesis and water-splitting interfaces. B01J (chemical/physical processes and catalysis) and H01M (batteries, cells, and fuel cells) form a secondary cluster, while B82Y (nanotechnology) and H01L (semiconductor devices) indicate emerging cross-disciplinary work at the interface of nanomaterials and photovoltaic-electrochemical systems.
↗ Hover for values · click a bar to ask EurekaCitation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
A method for synthesizing a ferroelectric-semiconductor composite material with enhanced electrocatalytic and energy storage properties. The process involves synthesizing BiVO<sub>4 </sub>powder by mixing Bi<sub>2</sub>O<sub>3 </sub>and V<sub>2</sub>O<sub>5 </sub>with ethanol, grinding the mixture for about 3 hours, pressing into a pellet, and calcining it… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | 一种泡沫镍负载纳米花状硫化镍-硫化钼催化剂及制备方法和应用 | 19 |
| 2 | Substrate-electrode (SE) interface illuminated pho… | 6 |
| 3 | Electrolytic catalyst containing reduced oxides of… | 6 |
| 4 | 一种基于氢溢流策略的Ru/F-FeCoOOH异质结电催化剂的制备方法 | 5 |
| 5 | System and methods for low-voltage bipolar hydroge… | 5 |
| 6 | 一种C/C复合材料表面生长CuNi双金属复合VN的电催化剂及其制备方法和应用 | 4 |
| 7 | Colloidal-copper based water oxidation electrocata… | 4 |
| 8 | Molecular electrocatalytic systems and methods the… | 2 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
The field is in an early-growth phase with a single industrial leader and a broad academic base. Entry barriers are still forming, making the next two to three years a high-leverage window for strategic positioning.
The lifecycle evidence classifies this field as Growth, with annual filings still rising and multi-year growth at 517%. The field moved from essentially zero activity in 2017 to its highest recorded annual volumes in 2024–2025. Publication lag means the true current run-rate is likely higher than filed records show. R&D teams entering now face a window before the field matures and dominant designs lock in.
Early GrowthThe top five filers hold 35% of the hundred largest filers' combined total, indicating moderate concentration at the apex but significant fragmentation below. Most mid-tier filers are single-digit contributors. This structure means the leader's position is defensible but not unassailable, and a focused challenger accumulating ten or more patent records in a specific sub-route could shift the balance within two to three filing cycles.
Moderate ConcentrationThe only documented co-applicant collaboration in the evidence is between Repsol SA (the field leader) and Enagas Services Solutions, with seven joint filings — the strongest collaborative signal in the corpus. This industrial pairing around electrolytic hydrogen production suggests a vertically integrated value-chain strategy. No academic-industry co-filing pairs appear in the collaboration data, leaving that route open for new entrants seeking to leverage public research.
Industrial Co-filingIndia is the leading filing jurisdiction by patent records, ahead of the United States and China. WIPO PCT filings are present, indicating some applicants are seeking broader international protection, but Europe (EPO) coverage is minimal. The strong Indian footprint reflects the large cluster of Indian academic and public-sector filers. Teams targeting commercial deployment in Europe or North America should note that filing density in those jurisdictions remains low relative to the volume of underlying research.
India-Led GeographyGo beyond the landscape: Eureka's TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| REPSOL SA | Enagas Services Solutions S.L.U. | 7 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
The applicant landscape splits into one clear industrial leader, a co-filing industrial partner, and a rapidly expanding tier of academic and public-sector institutions. Momentum data shows the academic tier is composed primarily of new entrants, suggesting the competitive map will look different within two to three years.
REPSOL SA holds the top position with 10 patent records. Its technology focus is concentrated in C25B 9 and C25B 1 (electrolytic production of compounds) and H01L 31 (semiconductor devices), indicating a strategy that combines electrochemical process patents with photovoltaic-electrochemical interface work. REPSOL SA files jointly with Enagas Services Solutions, and together the two entities account for a combined 16 patent records, reinforcing their lead over any single challenger.
patent records: 10The Council of Scientific and Industrial Research ranks second with 7 patent records and is flagged as a new entrant in the momentum data, with 4 recent filings. Its technology emphasis spans B01J 23 (heterogeneous catalysis), H01M 4 (fuel cell and battery electrodes), and B82Y 30 (nanotechnology applications), pointing to a broader materials-science approach than the industrial leader. King Fahd University of Petroleum and Minerals, also a new entrant with 3 recent records, reinforces the academic-institution challenge tier.
patent records: 7| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Council of Scientific and Industrial Research (CSIR) | 4 | ▲ new entrant |
| King Fahd University of Petroleum and Minerals | 3 | ▲ new entrant |
| Indian Institute of Technology Bombay | 2 | ▲ new entrant |
Several IPC branches appear in the corpus at low record counts relative to the dominant C25B core. These are observations of relative sparsity; the ones noted below also carry plausible technical value and realistic entry paths for teams already active in the electrocatalysis space.
H01L (semiconductor devices) appears in 14 patent records — roughly a fifth of the C25B count — despite being the third technology focus area for both REPSOL SA and Enagas Services Solutions. The technical value is high: integrating photoactive semiconductor junctions with electrocatalyst interfaces is central to photoelectrochemical water splitting and solar-driven CO2 reduction. Entry paths exist through co-development with photovoltaic research groups or by extending existing C25B electrode architectures to include buried junction designs.
Search this in Eureka →C01B (non-metallic elements and inorganic compounds) appears in only 10 patent records, representing a sparse 5% share of the IPC distribution. This branch covers electrocatalytic nitrogen reduction to ammonia, green hydrogen, and other inorganic synthesis routes that are directly relevant to the energy transition. The sparsity is notable given strong academic interest in these chemistries. Teams with materials expertise in transition-metal nitrides or oxyhydroxides could find a relatively uncrowded entry point here.
Search this in Eureka →Route coverage across the main technology branches in the current evidence set.
| Player | C25B 1 · Electrolytic production of compounds | C25B 11 · Electrolytic production of compounds | B01J 23 · Chemical/physical processes & catalysis | C25B 9 · Electrolytic production of compounds | H01M 4 · Batteries, cells & fuel cells |
|---|---|---|---|---|---|
| REPSOL SA | Strong · 14 | Emerging · 2 | Absent | Strong · 15 | Absent |
| Enagas Services Solutions S.L.U. | Strong · 7 | Absent | Absent | Strong · 7 | Absent |
| Council of Scientific and Industrial Research (CSIR) | Absent | Strong · 3 | Strong · 5 | Absent | Strong · 5 |
| King Fahd University of Petroleum and Minerals | Strong · 4 | Strong · 4 | Strong · 3 | Absent | Absent |
| National Institute of Technology Warangal | Strong · 2 | Strong · 3 | Absent | Absent | Strong · 2 |
| Bharathiar University | Strong · 2 | Moderate · 1 | Absent | Absent | Moderate · 1 |
The analysis covers 70 patent families in scope. This is a relatively small corpus consistent with an early-growth field that began accumulating meaningful filings only around 2020–2021.
REPSOL SA leads with 10 patent records, ahead of the Council of Scientific and Industrial Research (7 records) and Enagas Services Solutions (6 records). REPSOL SA and Enagas Services Solutions also co-file, with 7 joint filings documented in the collaboration data.
India is the leading filing jurisdiction by patent records, followed by the United States and China. WIPO PCT filings indicate some applicants are pursuing broader international protection, while Europe (EPO) coverage remains low.
C25B (electrolytic production of compounds) is the dominant IPC branch by patent records, reflecting the field's core focus on electrochemical synthesis and electrode interface design. B01J (catalysis), H01M (batteries and fuel cells), and B82Y (nanotechnology) form a secondary cluster.
The lifecycle evidence classifies this field as Growth, with annual filings still rising. The multi-year growth figure is 517%. The most recent filing years (2025–2026) are under-counted due to publication lag and should be read as floor estimates.
The whitespace analysis highlights H01L (semiconductor device integration, 14 records) and C01B (inorganic compound synthesis, 10 records) as the most technically valuable under-served branches. B22F (powder metallurgy) and H01G (capacitors) are even sparser at 3 records each, though their technical relevance to core electrocatalyst interface design is narrower.
This report's underlying patent dataset — filings, assignees, technology clusters — is open for developers via MCP and REST API. Free to start, 10,000 credits, no credit card required.
Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
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