journal article·2022-08-22

Cu2O-Derived PtCu Nanoalloy toward Energy-Efficient Hydrogen Production via Hydrazine Electrolysis under Large Current Density

Shangmeng Ge, Liwen Zhang, Junrong Hou, Shuai Liu, Yongji Qin, Qian Liu, Xiaobing Cai, Zhiyong Sun, Miaosen Yang, Jun Luo, Xijun Liu

ACS Applied Energy Materials· Volume 5· Issue 8
Publisher page

Abstract

Electrocatalytic overall water splitting (OWS), powered by a renewable energy source, is a promising strategy for hydrogen production. However, the OWS system usually requires large energy consumption due to the sluggish kinetics of the anodic oxygen evolution reaction. Herein, we fabricated a PtCu nanoalloy (PtCu-NA) through a template-assisted method and evaluated its bifunctional activities for both hydrogen evolution reaction (HER) in 1 M KOH and hydrazine oxidation reaction (HzOR) in 1 M KOH + 1 M hydrazine. Remarkably, the interplanar crystal spacing of PtCu-NA was larger than that of standard PtCu and closer to that of Pt, which can be attributed to the template-assisted synthesis method. Thus, the as-prepared PtCu-NA needs low overpotentials of 224 and 668 mV to drive HER and HzOR at 100 and 200 mA cm–2, respectively, which are much better than those of commercial Pt/C (453 and 1081 mV). After coupling the HER and HzOR together, the overall hydrazine splitting (OHzS) cell needs a small voltage of 0.666 V to deliver 200 mA cm–2 in 1 M KOH + 1 M hydrazine, outperforming the Pt/C (0.792 V). Impressively, the assembly OHzS cell could run stably for more than 110 h. These performances can be attributed to the regulation of the crystal structure of the PtCu alloy and the synergistic effect between Pt and Cu.
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Research context

OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Copper-based nanomaterials and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute for New Energy Materials and Low-Carbon Technologies and Tianjin Key Lab for Photoelectric Materials & Devices, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China

State Key Laboratory for Marine Corrosion and Protection, Luoyang Ship Material Research Institute (LSMRI), Qingdao 266273, China

Research Centre of Information Technology, Shenzhen Institute of Information Technology, Shenzhen 518172, China

Institute for Advanced Study, Chengdu University, Chengdu 610106, Sichuan, China

School of Aerospace Engineering, Xi’an Jiaotong University, Xi’an 710049, China

School of Chemical Engineering, Northeast Electric Power University, Jilin 132012, China

MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials, and Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, School of Resource, Environments and Materials, Guangxi University, Nanning 530004, China

Funding

State Key Laboratory For Marine Corrosion and Protection, Luoyang Ship Material Research Institute · National Natural Science Foundation of China

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