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Title: Discovery of Fe–Ce Oxide/BiVO4 Photoanodes through Combinatorial Exploration of Ni–Fe–Co–Ce Oxide Coatings

Journal Article · · ACS Applied Materials and Interfaces
 [1];  [2];  [3];  [3];  [3];  [2];  [2]
  1. California Inst. of Technology (CalTech), Pasadena, CA (United States). Joint Center for Artificial Photosynthesis (JCAP); Joint Center for Artificial Photosynthesis, California Institute of Technology
  2. California Inst. of Technology (CalTech), Pasadena, CA (United States). Joint Center for Artificial Photosynthesis (JCAP)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Joint Center for Artificial Photosynthesis (JCAP) and Chemical Sciences Division

An efficient photoanode is a prerequisite for a viable solar fuels technology. The challenges to realizing an efficient photoanode include the integration of a semiconductor light absorber and a metal oxide electrocatalyst to optimize corrosion protection, light trapping, hole transport, and photocarrier recombination sites. In order to efficiently explore metal oxide coatings, we employ a high throughput methodology wherein a uniform BiVO4 film is coated with 858 unique metal oxide coatings covering a range of metal oxide loadings and the full (Ni-Fe-Co-Ce)Ox pseudo-quaternary composition space. Photoelectrochemical characterization of the photoanodes reveals that specific combinations of metal oxide composition and loading provide up to a 13-fold increase in the maximum photoelectrochemical power generation for oxygen evolution in pH 13 electrolyte. Through mining of the high throughput data we identify composition regions that form improved interfaces with BiVO4. Of particular note, integrated photoanodes with catalyst compositions in the range Fe(0.4-0.6)Ce(0.6-0.4)Ox exhibit high interface quality and excellent photoelectrochemical power conversion. Furthermore, for scaled-up inkjet-printed electrodes and photoanodic electrodeposition of this composition on BiVO4 we can confirm the discovery and the synthesis-independent interface improvement of (Fe-Ce)Ox coatings on BiVO4.

Research Organization:
California Inst. of Technology (CalTech), Pasadena, CA (United States). Joint Center for Artificial Photosynthesis (JCAP); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
SC0004993; AC02-05CH11231
OSTI ID:
1333887
Journal Information:
ACS Applied Materials and Interfaces, Journal Name: ACS Applied Materials and Interfaces Journal Issue: 36 Vol. 8; ISSN 1944-8244
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

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Single-Source Bismuth (Transition Metal) Polyoxovanadate Precursors for the Scalable Synthesis of Doped BiVO 4 Photoanodes journal October 2018
Rational Design and Construction of Cocatalysts for Semiconductor-Based Photo-Electrochemical Oxygen Evolution: A Comprehensive Review journal November 2018
Scalable Triple Cation Mixed Halide Perovskite-BiVO 4 Tandems for Bias-Free Water Splitting journal July 2018
A Combinatorial Approach for Optimization of Oxygen Evolution Catalyst Loading on Mo‐doped BiVO 4 Photoanodes journal April 2019
Tracking materials science data lineage to manage millions of materials experiments and analyses journal July 2019
Interface engineering for light-driven water oxidation: unravelling the passivating and catalytic mechanism in BiVO 4 overlayers journal January 2019
Identifying high-efficiency oxygen evolution electrocatalysts from Co–Ni–Cu based selenides through combinatorial electrodeposition journal January 2019
Recent developments in complex metal oxide photoelectrodes journal April 2017
Photocurrent Recombination Through Surface Segregation in Al–Cr–Fe–O Photocathodes journal October 2019