A general potentiodynamic approach for red phosphorus and sulfur nanodot incorporation on reduced graphene oxide sheets: metal-free and binder-free electrodes for supercapacitor and hydrogen evolution activities

Autor(es)

Khalid, Mohd. ^[1] ; Varela, Hamilton ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Chem Sao Carlos, POB 780, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF MATERIALS CHEMISTRY A; v. 6, n. 7, p. 3141-3150, FEB 21 2018.
• Citações Web of Science: 9

Resumo

A general potentiodynamic strategy, for the first time, was proposed to incorporate red phosphorus (P) and sulfur (S) nanodots on reduced graphene oxide sheets (rGO) on a carbon fabric support. Uniformly embedded nanodots on rGO sheets were visualized using transmission electron microscopy. The as-prepared metal-free and binder-free electrodes can serve for both supercapacitors and the hydrogen evolution reaction. In particular, P nanodot incorporated rGO demonstrates a high specific capacitance of 334.2 F g(-1), of which 99.2% is retained after 10 000 repeated charge/discharge cycles. Furthermore, this material delivers a current density of 10 mA cm(-2) at an overpotential of -0.44 V versus RHE for the hydrogen evolution reaction in acidic medium. (AU)

• Processo FAPESP: 17/00433-5 - Desenho e síntese de electrocatalisador multifuncional sem metais em fios de fibra de carbono para redução de oxigênio e reações de desprendimento de oxigênio e hidrogênio
• Beneficiário: Mohmmad Khalid
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/16930-7 - Eletrocatálise V: processos eletrocatalíticos de interconversão entre as energias química e elétrica
• Beneficiário: Edson Antonio Ticianelli
• Modalidade de apoio: Auxílio à Pesquisa - Temático