Issue 4, 2024

Hydrogen spillover on N-doped carbon coating improves the hydrogenation performance of nickel catalysts

Abstract

Improving the catalytic efficiency of earth-abundant metals, such as nickel, through surface design has the potential to replace noble-metal-based catalysts. Here, we report that coating nickel with nitrogen-doped carbon (Ni@NC) enhances its stability and activity for the semi-hydrogenation of phenylacetylene under mild conditions. Mechanistic studies with substituted phenylacetylenes revealed an electronic effect that suggests a contribution of the homolytic cleavage of H2 followed by hydrogen spillover to the N-doped carbon coating. As a result, the hydrogenation reaction occurs at temperatures as low as 25 °C, while the benchmark RANEY® nickel is inactive. These results are supported by a combination of experimental results and theoretical insights. Moreover, this efficient hydrogenation catalyst is resistant to carbon monoxide poisoning and remains active even at low temperatures.

Graphical abstract: Hydrogen spillover on N-doped carbon coating improves the hydrogenation performance of nickel catalysts

Supplementary files

Article information

Article type
Paper
Submitted
22 Oct 2023
Accepted
17 Jan 2024
First published
17 Jan 2024

Catal. Sci. Technol., 2024,14, 1017-1025

Hydrogen spillover on N-doped carbon coating improves the hydrogenation performance of nickel catalysts

B. H. Arpini, J. L. Fiorio, J. V. F. da Costa, J. Joswig and L. M. Rossi, Catal. Sci. Technol., 2024, 14, 1017 DOI: 10.1039/D3CY01472J

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