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

Autor(es)

Arpini, Bruno Henrique ; Fiorio, Jhonatan Luiz ; da Costa, Joao Victor Ferreira ; Joswig, Jan-Ole ; Rossi, Liane Marcia

• Tipo de documento: Artigo Científico
• Fonte: CATALYSIS SCIENCE & TECHNOLOGY; v. 14, n. 4, p. 9-pg., 2024-01-17.

Resumo

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 degrees C, while the benchmark RANEY (R) 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. Ni@N-doped carbon exhibits superior hydrogenation activity than RANEY (R) nickel. The high activity was attributed to hydrogen spillover from Ni to N-doped carbon, which also enhances CO poisoning resistance. (AU)

• Processo FAPESP: 20/15230-5 - Centro de Pesquisa e Inovação de Gases de Efeito Estufa - RCG2I
• Beneficiário: Julio Romano Meneghini
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 18/26253-6 - Catálise cooperativa: uma alternativa para o desenvolvimento de catalisadores a base de ouro e metais de transição abundantes
• Beneficiário: Liane Marcia Rossi
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 17/24348-7 - Desenvolvimento de catalisadores híbridos para a conversão de CO2 em produtos químicos e combustíveis
• Beneficiário: Bruno Henrique Arpini
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 14/50279-4 - Brasil Research Centre for Gas Innovation
• Beneficiário: Julio Romano Meneghini
• Modalidade de apoio: Auxílio à Pesquisa - Programa Centros de Pesquisa em Engenharia
• Processo FAPESP: 21/00675-4 - Arquitetura de materiais para armazenamento de energia eletroquímica e catálise
• Beneficiário: Roberto Manuel Torresi
• Modalidade de apoio: Auxílio à Pesquisa - Temático