Controllable Deposition of Bi onto Pd for Selective Hydrogenation of Acetylene

Author:

Kang Hongquan1,Wu Jianzhou1ORCID,Lou Baohui1,Wang Yue1,Zhao Yilin1,Liu Juanjuan2ORCID,Zou Shihui1ORCID,Fan Jie13

Affiliation:

1. Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310027, China

2. College of Materials & Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310036, China

3. Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan 030032, China

Abstract

The rational regulation of catalyst active sites at atomic scale is a key approach to unveil the relationship between structure and catalytic performance. Herein, we reported a strategy for the controllable deposition of Bi on Pd nanocubes (Pd NCs) in the priority order from corners to edges and then to facets (Pd NCs@Bi). The spherical aberration-corrected scanning transmission electron microscopy (ac-STEM) results indicated that Bi2O3 with an amorphous structure covers the specific sites of Pd NCs. When only the corners and edges of the Pd NCs were covered, the supported Pd NCs@Bi catalyst exhibited an optimal trade-off between high conversion and selectivity in the hydrogenation of acetylene to ethylene under ethylene-rich conditions (99.7% C2H2 conversion and 94.3% C2H4 selectivity at 170 °C) with remarkable long-term stability. According to the H2-TPR and C2H4-TPD measurements, the moderate hydrogen dissociation and the weak ethylene adsorption are responsible for this excellent catalytic performance. Following these results, the selectively Bi-deposited Pd nanoparticle catalysts showed incredible acetylene hydrogenation performance, which provides a feasible perspective to design and develop highly selective hydrogenation catalysts for industrial applications.

Funder

National Natural Science Foundation of China

National Key Research and Development Program of China

Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering

Zhejiang Province Natural Science Foundation

Publisher

MDPI AG

Subject

Chemistry (miscellaneous),Analytical Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Molecular Medicine,Drug Discovery,Pharmaceutical Science

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