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Title: Selective electrochemical generation of hydrogen peroxide from water oxidation

Abstract

Water is a life-giving source, fundamental to human existence, yet over a billion people lack access to clean drinking water. The present techniques for water treatment such as piped, treated water rely on time and resource intensive centralized solutions. In this work, we propose a decentralized device concept that can utilize sunlight to split water into hydrogen and hydrogen peroxide. The hydrogen peroxide can oxidize organics while the hydrogen bubbles out. In enabling this device, we require an electrocatalyst that can oxidize water while suppressing the thermodynamically favored oxygen evolution and form hydrogen peroxide. Using density functional theory calculations, we show that the free energy of adsorbed OH* can be used to determine selectivity trends between the 2e– water oxidation to H 2O 2 and the 4e– oxidation to O 2. We show that materials which bind oxygen intermediates sufficiently weakly, such as SnO 2, can activate hydrogen peroxide evolution. Furthermore, we present a rational design principle for the selectivity in electrochemical water oxidation and identify new material candidates that could perform H 2O 2 evolution selectively.

Authors:
 [1];  [2];  [3]
  1. Carnegie Mellon Univ., Pittsburgh, PA (United States); Stanford Univ., Stanford, CA (United States)
  2. Technical Univ. of Denmark, Lyngby (Denmark); Stanford Univ., Stanford, CA (United States)
  3. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1263404
Report Number(s):
SLAC-PUB-16634
Journal ID: ISSN 1948-7185; arXiv:1509.07444
Grant/Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Physical Chemistry Letters
Additional Journal Information:
Journal Volume: 6; Journal Issue: 21; Journal ID: ISSN 1948-7185
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; PHYS

Citation Formats

Viswanathan, Venkatasubramanian, Hansen, Heine A., and Norskov, Jens K. Selective electrochemical generation of hydrogen peroxide from water oxidation. United States: N. p., 2015. Web. doi:10.1021/acs.jpclett.5b02178.
Viswanathan, Venkatasubramanian, Hansen, Heine A., & Norskov, Jens K. Selective electrochemical generation of hydrogen peroxide from water oxidation. United States. doi:10.1021/acs.jpclett.5b02178.
Viswanathan, Venkatasubramanian, Hansen, Heine A., and Norskov, Jens K. Thu . "Selective electrochemical generation of hydrogen peroxide from water oxidation". United States. doi:10.1021/acs.jpclett.5b02178. https://www.osti.gov/servlets/purl/1263404.
@article{osti_1263404,
title = {Selective electrochemical generation of hydrogen peroxide from water oxidation},
author = {Viswanathan, Venkatasubramanian and Hansen, Heine A. and Norskov, Jens K.},
abstractNote = {Water is a life-giving source, fundamental to human existence, yet over a billion people lack access to clean drinking water. The present techniques for water treatment such as piped, treated water rely on time and resource intensive centralized solutions. In this work, we propose a decentralized device concept that can utilize sunlight to split water into hydrogen and hydrogen peroxide. The hydrogen peroxide can oxidize organics while the hydrogen bubbles out. In enabling this device, we require an electrocatalyst that can oxidize water while suppressing the thermodynamically favored oxygen evolution and form hydrogen peroxide. Using density functional theory calculations, we show that the free energy of adsorbed OH* can be used to determine selectivity trends between the 2e– water oxidation to H2O2 and the 4e– oxidation to O2. We show that materials which bind oxygen intermediates sufficiently weakly, such as SnO2, can activate hydrogen peroxide evolution. Furthermore, we present a rational design principle for the selectivity in electrochemical water oxidation and identify new material candidates that could perform H2O2 evolution selectively.},
doi = {10.1021/acs.jpclett.5b02178},
journal = {Journal of Physical Chemistry Letters},
issn = {1948-7185},
number = 21,
volume = 6,
place = {United States},
year = {2015},
month = {10}
}

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Cited by: 14 works
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