Bimetallic Oxide Electrocatalyst for Ambient Methane-to-Methanol
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for converting methane to methanol are inefficient and environmentally harmful, with high-temperature processes requiring significant energy and low-temperature processes limited by mass transfer and the lack of effective catalysts, while electrochemical processes face challenges in activating methane at ambient conditions due to high C—H bond energy and competition with oxygen evolution reactions.
Innovation Solution
An electrochemical cell using a bimetallic catalyst with a patterned arrangement of metals like Cu, Pd, Ag, Ni, Ti, Ir, Ru, Sn, Pb, and Pt supports methane conversion to methanol and formate at ambient conditions, employing a reactant-impulse chronoamperometry method to measure methane binding energy and utilizing a gas diffusion electrode for efficient methane transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional high-temperature processes are used to convert methane to methanol, then conversion efficiency is improved, but energy consumption increases significantly
Solution Approach 1:
The invention changes the operating parameters from high temperature to ambient temperature electrochemical conditions, fundamentally altering the energy input mode while maintaining effective methane conversion through electrocatalytic activation
Solution Approach 2:
The invention replaces thermal energy input with electrical energy input, substituting thermocatalytic mechanisms with electrocatalytic mechanisms to achieve methane activation at ambient temperatures with reduced energy consumption
2Use of energy by moving object
If low-temperature processes are used for methane conversion, then energy consumption is reduced, but mass transfer efficiency and catalyst activity deteriorate
Solution Approach 1:
The invention introduces electrochemical intermediaries and electrocatalytic active sites that facilitate methane activation and mass transfer at ambient temperatures, overcoming the limitations of direct thermal processes
Solution Approach 2:
The invention changes the temperature parameter to ambient conditions while compensating for reduced mass transfer through electrochemical enhancement mechanisms, achieving both low energy consumption and maintained productivity
3Use of energy by moving object
If electrochemical oxidation is performed at ambient conditions, then energy consumption is reduced, but methane activation difficulty increases due to high C-H bond energy
Solution Approach 1:
The invention employs composite electrocatalyst materials with synergistic metal combinations that provide multiple active sites for methane activation, overcoming the high C-H bond energy barrier through cooperative catalytic effects
Solution Approach 2:
The invention creates localized active sites with optimized electronic structures and surface properties that concentrate catalytic activity at specific locations, enhancing methane activation efficiency through local electronic and geometric effects
4Use of energy by moving object
If electrochemical oxidation is performed at ambient conditions, then energy consumption is reduced, but selectivity deteriorates due to competition with oxygen evolution reaction
Solution Approach 1:
The invention segments the catalytic function by assigning specific metal components to different reactions: one metal promotes methane oxidation while the other suppresses oxygen evolution, achieving reaction selectivity through functional division
Solution Approach 2:
The invention creates spatially differentiated catalytic properties where different regions of the electrocatalyst surface exhibit different selectivities, with interface regions providing enhanced selectivity for methane oxidation over oxygen evolution
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The process achieves faradaic efficiencies of 6-20% for methanol production and 10-80% for methane oxidation, significantly higher than conventional methods, with stable and selective catalysts that operate at ambient temperatures and pressures.
Implementation Method 1
Electrochemical oxidation of methane (CH4) at ambient conditions offers a sustainable route for efficient utilization of abundant natural resources
Implementation Method 2
employing a reactant-impulse chronoamperometry method to measure methane binding energy and utilizing a gas diffusion electrode for efficient methane transport
Implementation Method 3
The anode comprises or has disposed thereon a bimetallic catalyst. The bimetallic catalyst comprising a patterned arrangement of a first metal region and a second metal region disposed on a support. Methane is converted to methanol and/or formate when methane contacts the bimetallic catalysts
Data Source
AI summary
An electrochemical cell for conversion of methane to methanol includes a bimetallic catalyst having alternating regions of first and second metals thereby providing interfaces at which methane is converted to methanol or formate.