Issue

Vol. 15 (2023)

Waste-Derived Catalysts for Water Electrolysis: Circular Economy-Driven Sustainable Green Hydrogen Energy

https://doi.org/10.1007/s40820-022-00974-7
Zhijie Chen
Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
Sining Yun
Functional Materials Laboratory (FML), School of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, People’s Republic of China
Lan Wu
Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
Jiaqi Zhang
Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
Xingdong Shi
Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
Wei Wei
Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
Yiwen Liu
Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia
Renji Zheng
School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, People’s Republic of China
Ning Han
Department of Materials Engineering, KU Leuven, 3001 Louvain, Belgium
Bing‑Jie Ni
Centre for Technology in Water and Wastewater (CTWW), School of Civil and Environmental Engineering, University of Technology Sydney, Ultimo, NSW 2007, Australia

Corresponding Author: Bing‑Jie Ni

bingjieni@gmail.com

Nano-Micro Letters, Vol. 15 (2023), Article Number: 4

Abstract

The sustainable production of green hydrogen via water electrolysis necessitates cost-effective electrocatalysts. By following the circular economy principle, the utilization of waste-derived catalysts significantly promotes the sustainable development of green hydrogen energy. Currently, diverse waste-derived catalysts have exhibited excellent catalytic performance toward hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and overall water electrolysis (OWE). Herein, we systematically examine recent achievements in waste-derived electrocatalysts for water electrolysis. The general principles of water electrolysis and design principles of efficient electrocatalysts are discussed, followed by the illustration of current strategies for transforming wastes into electrocatalysts. Then, applications of waste-derived catalysts (i.e., carbon-based catalysts, transitional metal-based catalysts, and carbon-based heterostructure catalysts) in HER, OER, and OWE are reviewed successively. An emphasis is put on correlating the catalysts’ structure–performance relationship. Also, challenges and research directions in this booming field are finally highlighted. This review would provide useful insights into the design, synthesis, and applications of waste-derived electrocatalysts, and thus accelerate the development of the circular economy-driven green hydrogen energy scheme.


Highlights:


1 Critical strategies for converting wastes to catalysts are summarized.
2 Applications of waste-derived catalysts in hydrogen evolution reaction, oxygen evolution reaction, and overall water electrolysis are comprehensively reviewed.
3 Perspectives in the development of waste-derived catalysts are analyzed.

Keywords

Waste-derived electrocatalysts Water splitting Sustainable hydrogen energy Catalyst design Circular economy
Chen, Zhijie, Sining Yun, Lan Wu, Jiaqi Zhang, Xingdong Shi, Wei Wei, Yiwen Liu, Renji Zheng, Ning Han, and Bing‑Jie Ni. 2022. “Waste-Derived Catalysts for Water Electrolysis: Circular Economy-Driven Sustainable Green Hydrogen Energy”. Nano-Micro Letters 15 (December):4. https://doi.org/10.1007/s40820-022-00974-7.
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