Robust hydrogen evolution reaction activity catalyzed by ultrasmall Rh-Rh2P nanoparticles

被引：53

作者：

Luo, Fang ^{[1
]}

Guo, Long ^{[1
]}

Xie, Yuhua ^{[1
]}

Xu, Jingxiang ^{[2
]}

Cai, Weiwei ^{[1
]}

Qu, Konggang ^{[3
]}

Yang, Zehui ^{[1
]}

机构：

[1] China Univ Geosci Wuhan, Sustainable Energy Lab, Fac Mat Sci & Chem, 388 Lumo Rd, Wuhan 430074, Peoples R China

[2] Shanghai Ocean Univ, Coll Engn Sci & Technol, Shanghai 201306, Peoples R China

[3] Liaocheng Univ, Shandong Prov Key Lab, Collaborat Innovat Ctr Chem Energy Storage & Nove, Liaocheng 252059, Shandong, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2020年 / 8卷 / 25期

基金：

中国国家自然科学基金;

关键词：

HIGHLY EFFICIENT ELECTROCATALYST; UNIVERSAL SYNTHESIS STRATEGY; NICKEL PHOSPHIDE; OXYGEN REDUCTION; SINGLE; NANOSHEETS; OXIDATION; PERFORMANCE; TEMPLATE; PLATINUM;

D O I：

10.1039/d0ta04773b

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Efficient electrocatalysts for the hydrogen evolution reaction (HER) in both acidic and alkaline media are prominently important to advance the widespread application of industrial water splitting technology. In this work, we have synthesized ultrasmall rhodium-rhodium phosphide hetero-nanoparticles (3.4 nm, Rh-Rh2P@C) by partial phosphorization of Rh@C at 300 degrees C together with Na2HPO2. The constructed Rh-Rh2P@C requires only 24 mV and 37 mV overpotentials to reach 10 mA m(-2)in 0.5 M H(2)SO(4)and 1 M KOH electrolytes, which are lower than those of Rh@C and Rh2P@C due to the formation of heterointerfaces inducing modulation of local electronic structures and more active sites; as a result, a more moderate hydrogen adsorption-desorption strength is achieved for Rh-Rh2P@C as proved by theoretical calculation. Moreover, the calculated mass activity of Rh-Rh2P@C is 4 orders of magnitude higher than that of the benchmark Pt/C electrocatalyst. Besides, exceptional stability is recorded for Rh-Rh2P@C in both acidic and alkaline electrolytes due to the strong electronic interaction between Rh and Rh2P. This study offers a new strategy to manufacture efficient electrocatalysts for various applications.

引用

页码：12378 / 12384

页数：7

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