Dynamic coordination engineering of 2D PhenPtCl2 nanosheets for superior hydrogen evolution.

Autor: Shao, Gonglei, Jing, Changfei, Ma, Zhinan, Li, Yuanyuan, Dang, Weiqi, Guo, Dong, Wu, Manman, Liu, Song, Zhang, Xu, He, Kun, Yuan, Yifei, Luo, Jun, Dai, Sheng, Xu, Jie, Zhou, Zhen
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Zdroj: Nature Communications; 1/9/2024, Vol. 15 Issue 1, p1-10, 10p
Abstrakt: Exploring the dynamic structural evolution of electrocatalysts during reactions represents a fundamental objective in the realm of electrocatalytic mechanism research. In pursuit of this objective, we synthesized PhenPtCl2 nanosheets, revealing a N2-Pt-Cl2 coordination structure through various characterization techniques. Remarkably, the electrocatalytic performance of these PhenPtCl2 nanosheets for hydrogen evolution reaction (HER) surpasses that of the commercial Pt/C catalyst across the entire pH range. Furthermore, our discovery of the dynamic coordination changes occurring in the N2-Pt-Cl2 active sites during the electrocatalytic process, as clarified through in situ Raman and X-ray photoelectron spectroscopy, is particularly noteworthy. These changes transition from Phen-Pt-Cl2 to Phen-Pt-Cl and ultimately to Phen-Pt. The Phen-Pt intermediate plays a pivotal role in the electrocatalytic HER, dynamically coordinating with Cl- ions in the electrolyte. Additionally, the unsaturated, two-coordinated Pt within Phen-Pt provides additional space and electrons to enhance both H+ adsorption and H2 evolution. This research illuminates the intricate dynamic coordination evolution and structural adaptability of PhenPtCl2 nanosheets, firmly establishing them as a promising candidate for efficient and tunable electrocatalysts. Exploring the dynamic structural evolution of electrocatalysts during electrochemical reactions is imperative. Here, the authors constructed 2D PhenPtCl2 nanosheets with Phen-Pt-Cl2 coordination structure which exhibit dynamic coordination evolution during hydrogen evolution reaction and good performance across the full pH range [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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