三元运算
电催化剂
电负性
纳米颗粒
材料科学
电子转移
催化作用
合金
相(物质)
化学工程
化学物理
纳米技术
电化学
物理化学
化学
电极
复合材料
生物化学
有机化学
计算机科学
工程类
程序设计语言
作者
Shuai Zhang,Leilei Yin,Siyuan Wang,Jin‐Cheng Liu,Yabin Zhang,Yongqing Wen,Bingqian Zhang,Yaping Du
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-11-06
卷期号:17 (22): 23103-23114
被引量:3
标识
DOI:10.1021/acsnano.3c08921
摘要
Rare earth (RE) elements possess electronic configurations that can provide additional pathways for tailoring the electronic structures of active elements through alloying, making it an important area of exploration in electrocatalysis. However, the large negative redox potential between RE and Pt has hindered the development of RE nanoalloys. In this study, a solid-phase synthesis strategy was employed to synthesize ternary Pt3-xIrxSc nanoparticles (NPs). By leveraging the electronegativity difference between Pt (2.28), Ir (2.20), and Sc (1.36), a charge-balance strategy was implemented to stabilize and enhance the catalytic performance of the alloy. The electron transfer from Sc to Pt/Ir results in the latter being negatively charged, and the Ir modifies the electron density of Pt, enabling favorable adsorption of active H species during the hydrogen evolution reaction (HER). Pt2IrSc exhibits enhanced HER activity at all pH values, achieving low overpotentials at 10 mA cm-2 of only 13, 18, and 25 mV in 0.5 M H2SO4, 1 M PBS, and 1 M KOH, respectively. This electrocatalyst also exhibits robust electrocatalytic stability even after 20,000 cycles. This work represents an application of the charge balance strategy to RE nanoalloys, and it is expected to inspire the design and synthesis of highly reactive RE nanoalloys.
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