Tissue paper-derived porous carbon encapsulated transition metal nanoparticles as advanced non-precious catalysts: Carbon-shell influence on the electrocatalytic behaviour

JOURNAL OF COLLOID AND INTERFACE SCIENCE

卷:581

Article

Ahsan, Md Ariful^1,4  Santiago, Alain R. Puente¹  Sanad, Mohamed F.²  Weller, J. Mark^3,4  Fernandez-Delgado, Olivia¹  Barrera, Luis A.¹  Maturano-Rojas, Viridiana⁵  Alvarado-Tenorio, Bonifacio⁶  Chan, Candace K.^3,4  Noveron, Juan C.^1,4 

[1] Univ Texas El Paso, Dept Chem, El Paso, TX 79968 USA

[2] Univ Texas El Paso, Dept Phys, El Paso, TX 79968 USA

[3] Arizona State Univ, Sch Engn Matter Transport & Energy, Mat Sci & Engn, 501 E Tyler Mall,ECG 301, Tempe, AZ 85287 USA

[4] Nanosyst Engn Res Ctr Nanotechnol Enabled Water T, Houston, TX USA

[5] Univ Nacl Autonoma Mexico, Ctr Ciencias Aplicadas & Tecnol, AP 70-186, Mexico City 04510, DF, Mexico

[6] Univ Autonoma Ciudad Juarez, Inst Ciencias Biomed, Ciudad Juarez, Chihuahua, Mexico

关键词: Advanced oxidation process;    Hydrogen evolution reaction;    Metal NPs;    Peroxymonosulfate;    Porous carbon;   

DOI  :  10.1016/j.jcis.2020.08.012

来源: Elsevier

【 摘 要 】

Porous carbon encapsulated non-precious metal nanocatalysts have recently opened the ways towards the development of high-performance water remediation and energy conversion technologies. Herein, we report a facile, scalable and green synthetic methodology to fabricate porous carbon encapsulated transition metal nanocatalysts (M@TP: M = Cu, Ni, Fe and Co) using commercial tissue paper. The morphology, crystalline structure, chemical composition and textural properties of the M@TP nanocatalysts were thoroughly characterized. The catalytic activity of the M@TP nanocatalysts was investigated for the degradation of Congo red (CR) via peroxymonosulfate activation. Co@TP-6 was found to be the most active catalyst allowing 97.68% degradation in 30 min with a higher rate constant of 0.109 min(-1). The nanocatalysts also displayed a carbon shell thickness-dependent electrocatalytic hydrogen evolution reaction (HER) activity, most likely due to the shielding effect of the carbon layers over the electron transfer (ET) processes at the metal core/carbon interfaces. Remarkably, the Ni@TP-6 electrocatalyst, with the smaller carbon shell thickness, showed the best electrocatalytic performance. They delivered an ultralow onset potential of -30 mV vs RHE, an overpotential of 105 mV at a current density of 10 mA.cm(-2) and an excellent electrochemical stability to keep the 92% of the initial current applied after 25000 s, which is comparable with the HER activity of the state-of-the-art Ni-based catalysts. (C) 2020 Elsevier Inc. All rights reserved.

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