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Title: Operando investigation of Au-MnOx thin films with improved activity for the oxygen evolution reaction

Journal Article · · Electrochimica Acta
 [1];  [2];  [3];  [3];  [3];  [1];  [1];  [4]
  1. Technical Univ. of Denmark, Lyngby (Denmark)
  2. Stanford Univ., Stanford, CA (United States)
  3. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  4. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)

The electrochemical splitting of water holds great potential as a method for producing clean fuels by storing electricity from intermittent energy sources. The efficiency of such a process would be greatly facilitated by incorporating more active catalysts based on abundant materials for the oxygen evolution reaction. Manganese oxides are promising as catalysts for this reaction. Recent reports show that their activity can be drastically enhanced when modified with gold. Herein, we investigate highly active mixed Au-MnOx thin films for the oxygen evolution reaction, which exhibit more than five times improvement over pure MnOx. These films are characterized with operando X-ray Absorption Spectroscopy, which reveal that Mn assumes a higher oxidation state under reaction conditions when Au is present. As a result, the magnitude of the enhancement is correlated to the size of the Au domains, where larger domains are the more beneficial.

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
OSTI ID:
1349284
Alternate ID(s):
OSTI ID: 1413349
Journal Information:
Electrochimica Acta, Vol. 230, Issue C; ISSN 0013-4686
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 31 works
Citation information provided by
Web of Science

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Cited By (7)

Structural and electronic properties of Fe dopants in cobalt oxide nanoislands on Au(111) journal January 2019
Effects of Metal Electrode Support on the Catalytic Activity of Fe(oxy)hydroxide for the Oxygen Evolution Reaction in Alkaline Media journal August 2019
Layered and two dimensional metal oxides for electrochemical energy conversion journal January 2019
3D‐1D Heterostructure of CoZn Oxyphosphide Nanosheets Anchored on Carbon Nanotubes as Electrocatalysts for the Oxygen Evolution Reaction journal September 2018
Recent Progress in Bifunctional Electrocatalysts for Overall Water Splitting under Acidic Conditions journal May 2019
Constructing bundle-like Co-Mn oxides and Co-Mn selenides for efficient overall water splitting journal January 2018
Reliable electrochemical phase diagrams of magnetic transition metals and related compounds from high-throughput ab initio calculations journal June 2019