Highly efficient electrocatalytic hydrogen evolution coupled with upcycling of microplastics in seawater enabled via Ni3N/W5N4 janus nanostructures

Wang, Peng ¹Liu, Yuanyuan ¹Cheng, Hefeng ¹Dai, Ying ¹Zheng, Zhaoke ¹Huang, Baibiao ¹Ma, Fahao ¹Wang, Shuhua ¹Gong, Xueqin ¹Liu, Xiaolei ¹Wang, Zeyan¹

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作者信息

1. Shandong Univ
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Abstract

Electrochemical hydrogen evolution reaction (HER) coupled with microplastics reforming are critical for marine energy and environmental engineering, but filled with challenges. Herein, Ni3N/W5N4 Janus nanostructure with barrier-free heterointerface was designed via transition metal nitrides-inducing growth strategy. Benefiting from the interface synergistic effect, super-hydrophilic surface and multilevel Janus structure, Ni3N/W5N4 electrode displays Pt-like HER performance and the outstanding stability (similar to 300 h) under industrially current. Meanwhile, Ni3N/W5N4 also exhibits high activity and selectivity toward electro-reforming of plastics, showing an ultralow overpotential of 1.33 V (eta(10)) and generating the value-added HCOOH with the high Faradic efficiency of-85%. Impressively, driven by solar panels, the bifunctional Ni3N/W5N4 electrocatalyst achieves the highly efficient production of H-2 and HCOOH (eta(10) =1.4 V-eta solar to hydrogen=16.04%) in seawater full of plastics. This work underlines the on-site upgrading of plastic wastes and energy-saving hydrogen evolution in seawater enabled by the design of Janus heterostructures for metal nitrides.

Key words

Hydrogen evolution reaction/Microplastics upgrading/Value-added chemicals/Metal nitrides-inducing growth/Ni3N/TOTAL-ENERGY CALCULATIONS

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出版年

2022

Applied Catalysis

ISSN：0926-3373

被引量57

参考文献量50

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