High-loading As single-atom catalysts harvested from wastewater towards efficient and sustainable oxygen reduction

Literature Information

Publication Date 2023-11-07
DOI 10.1039/D3EE03274D
Impact Factor 38.532
Authors

Yangjun Luo, Yanwei Wang, Youyuan Wang, Jin Wan, Chuanzhen Feng, Lingmei Liu, Zaiping Guo, Jian Li


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Abstract

Arsenic (As) is a common element in groundwater contamination with similar chemical properties to nitrogen, exhibiting potential activity towards oxygen reduction reaction (ORR). However, the practical application of recovering arsenic-containing contaminants for ORR faces the formidable challenge of a trade-off between high activity and stability. Herein, we first report universal strategies to synthesize high-loading (up to 13.78 wt%) non-metal monoatoms on carbon and prepare As monoatomic catalysts as a demonstration. The dispersed zinc ions chelated by α-D-glucose significantly increase the loading of As monoatoms. Moreover, topological defects constructed by zinc evaporation enhance the intrinsic activity of adjacent As. The catalyst exhibits a much better half-wave potential (0.901 V) than 20% Pt/C (0.856 V). Re-calcination is further proposed to overcome the poor oxidation resistance of catalysts with abundant carbon defects. The catalyst treated by re-calcination demonstrates unprecedented stability, with only 9.86% deterioration in current density after 590 hours of operation in the fuel cell, outperforming the most advanced carbon-based catalysts. Our discoveries facilitate the practical application of high-loading, high-activity and high-stability non-metal catalysts originating from pollutants.

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Source Journal

Energy & Environmental Science

Energy & Environmental Science
CiteScore: 32.34
Self-citation Rate: 3.4%
Articles per Year: 481

Energy & Environmental Science is an international journal dedicated to publishing exceptionally important and high quality, agenda-setting research tackling the key global and societal challenges of ensuring the provision of energy and protecting our environment for the future. The scope is intentionally broad and the journal recognises the complexity of issues and challenges relating to energy conversion and storage, alternative fuel technologies and environmental science. For work to be published it must be linked to the energy-environment nexus and be of significant general interest to our community-spanning readership. All scales of studies and analysis, from impactful fundamental advances, to interdisciplinary research across the (bio)chemical, (bio/geo)physical sciences and chemical engineering disciplines are welcomed. Topics include, but are not limited to, the following: Solar energy conversion and photovoltaics Solar fuels and artificial photosynthesis Fuel cells Hydrogen storage and (bio) hydrogen production Materials for energy systems Capture, storage and fate of CO2, including chemicals and fuels from CO2 Catalysis for a variety of feedstocks (for example, oil, gas, coal, biomass and synthesis gas) Biofuels and biorefineries Materials in extreme environments Environmental impacts of energy technologies Global atmospheric chemistry and climate change as related to energy systems Water-energy nexus Energy systems and networks Globally applicable principles of energy policy and techno-economics

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