Cargando…

Biochar Nanocomposite Derived from Watermelon Peels for Electrocatalytic Hydrogen Production

[Image: see text] Water splitting is the most potential method to produce hydrogen energy, however, the conventional electrocatalysts encounter the hindrances of high overpotential and low hydrogen production efficiency. Herein, we report a carbon-based nanocomposite (denoted as CCW-x, x stands for...

Descripción completa

Detalles Bibliográficos
Autores principales: Yang, Zhou, Yang, Runmiao, Dong, Guanxiu, Xiang, Meng, Hui, Jia, Ou, Junfei, Qin, Hengfei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2021
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7841921/
https://www.ncbi.nlm.nih.gov/pubmed/33521446
http://dx.doi.org/10.1021/acsomega.0c05018
_version_ 1783643906413428736
author Yang, Zhou
Yang, Runmiao
Dong, Guanxiu
Xiang, Meng
Hui, Jia
Ou, Junfei
Qin, Hengfei
author_facet Yang, Zhou
Yang, Runmiao
Dong, Guanxiu
Xiang, Meng
Hui, Jia
Ou, Junfei
Qin, Hengfei
author_sort Yang, Zhou
collection PubMed
description [Image: see text] Water splitting is the most potential method to produce hydrogen energy, however, the conventional electrocatalysts encounter the hindrances of high overpotential and low hydrogen production efficiency. Herein, we report a carbon-based nanocomposite (denoted as CCW-x, x stands for the calcination temperature) derived from watermelon peels and CoCl(2), and the as-synthesized CCW-x is used as the electrocatalyst. The overpotential and the Tafel slope of CCW-700 for oxygen evolution reaction (OER) is 237 mV at 10 mA cm(–2) and 69.8 mV dec(–1), respectively, both of which are lower than those of commercial RuO(2). For hydrogen evolution reaction (HER), the overpotential of CCW-700 (111 mV) is higher than that of the widely studied Pt/C (73 mV) but still lower than those of lots of carbon-based nanomaterials (122–177 mV). In the light of CCW-700 is highly active for both OER and HER, we assembled a water-splitting electrocatalyst by employing nickel foam loaded with CCW-700 as the anode and cathode in 1 M KOH. The water-splitting voltage is only 1.54 V for the CCW-700//CCW-700 electrodes and 1.62 V for the RuO(2)//Pt/C ones. Therefore, the so-denoted CCW-x powder possesses good electrocatalytic hydrogen production efficiency.
format Online
Article
Text
id pubmed-7841921
institution National Center for Biotechnology Information
language English
publishDate 2021
publisher American Chemical Society
record_format MEDLINE/PubMed
spelling pubmed-78419212021-01-29 Biochar Nanocomposite Derived from Watermelon Peels for Electrocatalytic Hydrogen Production Yang, Zhou Yang, Runmiao Dong, Guanxiu Xiang, Meng Hui, Jia Ou, Junfei Qin, Hengfei ACS Omega [Image: see text] Water splitting is the most potential method to produce hydrogen energy, however, the conventional electrocatalysts encounter the hindrances of high overpotential and low hydrogen production efficiency. Herein, we report a carbon-based nanocomposite (denoted as CCW-x, x stands for the calcination temperature) derived from watermelon peels and CoCl(2), and the as-synthesized CCW-x is used as the electrocatalyst. The overpotential and the Tafel slope of CCW-700 for oxygen evolution reaction (OER) is 237 mV at 10 mA cm(–2) and 69.8 mV dec(–1), respectively, both of which are lower than those of commercial RuO(2). For hydrogen evolution reaction (HER), the overpotential of CCW-700 (111 mV) is higher than that of the widely studied Pt/C (73 mV) but still lower than those of lots of carbon-based nanomaterials (122–177 mV). In the light of CCW-700 is highly active for both OER and HER, we assembled a water-splitting electrocatalyst by employing nickel foam loaded with CCW-700 as the anode and cathode in 1 M KOH. The water-splitting voltage is only 1.54 V for the CCW-700//CCW-700 electrodes and 1.62 V for the RuO(2)//Pt/C ones. Therefore, the so-denoted CCW-x powder possesses good electrocatalytic hydrogen production efficiency. American Chemical Society 2021-01-14 /pmc/articles/PMC7841921/ /pubmed/33521446 http://dx.doi.org/10.1021/acsomega.0c05018 Text en © 2021 American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes.
spellingShingle Yang, Zhou
Yang, Runmiao
Dong, Guanxiu
Xiang, Meng
Hui, Jia
Ou, Junfei
Qin, Hengfei
Biochar Nanocomposite Derived from Watermelon Peels for Electrocatalytic Hydrogen Production
title Biochar Nanocomposite Derived from Watermelon Peels for Electrocatalytic Hydrogen Production
title_full Biochar Nanocomposite Derived from Watermelon Peels for Electrocatalytic Hydrogen Production
title_fullStr Biochar Nanocomposite Derived from Watermelon Peels for Electrocatalytic Hydrogen Production
title_full_unstemmed Biochar Nanocomposite Derived from Watermelon Peels for Electrocatalytic Hydrogen Production
title_short Biochar Nanocomposite Derived from Watermelon Peels for Electrocatalytic Hydrogen Production
title_sort biochar nanocomposite derived from watermelon peels for electrocatalytic hydrogen production
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7841921/
https://www.ncbi.nlm.nih.gov/pubmed/33521446
http://dx.doi.org/10.1021/acsomega.0c05018
work_keys_str_mv AT yangzhou biocharnanocompositederivedfromwatermelonpeelsforelectrocatalytichydrogenproduction
AT yangrunmiao biocharnanocompositederivedfromwatermelonpeelsforelectrocatalytichydrogenproduction
AT dongguanxiu biocharnanocompositederivedfromwatermelonpeelsforelectrocatalytichydrogenproduction
AT xiangmeng biocharnanocompositederivedfromwatermelonpeelsforelectrocatalytichydrogenproduction
AT huijia biocharnanocompositederivedfromwatermelonpeelsforelectrocatalytichydrogenproduction
AT oujunfei biocharnanocompositederivedfromwatermelonpeelsforelectrocatalytichydrogenproduction
AT qinhengfei biocharnanocompositederivedfromwatermelonpeelsforelectrocatalytichydrogenproduction