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Title: ZnO As an Active and Selective Catalyst for Electrochemical Water Oxidation to Hydrogen Peroxide

Journal Article · · ACS Catalysis

Electrochemical synthesis of hydrogen peroxide (H2O2) via two-electron water oxidation reaction (2e-WOR) is an ideal process for delocalized production for water cleaning and other applications. Previously observed water oxidation catalysts have limited activity and selectivity, imposing a bottleneck for broad adoption of this technology. We determine ZnO as a new stable, nontoxic, active, and selective catalyst for 2e-WOR to generate H2O2. Using density functional theory calculations, we propose that the (1010) facet of ZnO is an effective catalyst for 2e-WOR and confirm the prediction experimentally. We synthesize ZnO nanoparticles with a high fraction of (1010) facets and find that this catalyst gives an overpotential of 40 mV at 0.1 mA/cm2 and peak Faradaic efficiency of 81% toward H2O2 evolution.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-76SF00515; SC0008685
OSTI ID:
1529320
Journal Information:
ACS Catalysis, Vol. 9, Issue 5; ISSN 2155-5435
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 108 works
Citation information provided by
Web of Science

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Cited By (3)

Electrochemical H 2 O 2 Production and Accumulation from H 2 O by Composite Effect of Al 2 O 3 and BiVO 4 journal January 2019
Confined local oxygen gas promotes electrochemical water oxidation to hydrogen peroxide journal January 2020
Hydrogen peroxide electrochemical synthesis on hybrid double-atom (Pd–Cu) doped N vacancy g-C 3 N 4 : a novel design strategy for electrocatalyst screening journal January 2020