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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...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2021
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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 |
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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 |
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