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Title: Dual properties of a hydrogen oxidation Ni-catalyst entrapped within a polymer promote self-defense against oxygen

Journal Article · · Nature Communications

A bio-inspired O2 sensitive nickel catalyst dispersed in a hydrophobic and redox-silent polymer matrix shows enhanced stability for catalytic H2 oxidation as well as O2 tolerance. A simple but efficient electrode design separates the catalyst into two different reaction layers to promote different reactivity on the catalyst. (1) close to the electrode surface, the catalyst can directly exchange electrons with the electrode and generate current from H2 oxidation; and (2) at the outer film boundary, the electrolyte exposed layer is electrically isolated from the electrode, which enables the H2 reduced Ni-complex to convert O2 to H2O and thus provides protection to the O2-sensitive inner reaction layer. This strategy solves one of the biggest limitations of these otherwise outstanding catalysts and could be used to protect other similar catalysts whose wider application is currently limited by sensitivity towards oxygen.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1424831
Report Number(s):
PNNL-SA-129794; KC0302010
Journal Information:
Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 28 works
Citation information provided by
Web of Science

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Cited By (7)

Über die Leerlaufspannung von Biobrennstoffzellen: Nernstverschiebung bei pseudokapazitiven Elektroden journal September 2018
The Open Circuit Voltage in Biofuel Cells: Nernstian Shift in Pseudocapacitive Electrodes journal September 2018
Chemistry of α-Phosphanyl α-Amino Acids: Chemistry of α-Phosphanyl α-Amino Acids journal December 2018
Designing electrochemically reversible H2 oxidation and production catalysts journal August 2018
Polymeric coatings for applications in electrocatalytic and photoelectrosynthetic fuel production journal January 2018
Tolerant to air σ-alkane complexes by surface modification of single crystalline solid-state molecular organometallics using vapour-phase cationic polymerisation: SMOM@polymer journal January 2020
Controlled Substrate Transport to Electrocatalyst Active Sites for Enhanced Selectivity in the Carbon Dioxide Reduction Reaction journal June 2019

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