Iridium Nanotubes as Bifunctional Electrocatalysts for Oxygen Evolution and Nitrate Reduction Reactions
One-dimensionally (1D) hollow noble meal nanotubes are attracting continuous attention because of their huge potential applications in catalysis and electrocatalysis. Herein, we successfully synthesize hollow iridium nanotubes (Ir NTs) with the rough porous surface by the 1-hydroxyethylidene-1, 1-di...
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Veröffentlicht in: | ACS applied materials & interfaces 2020-03, Vol.12 (12), p.14064-14070 |
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creator | Zhu, Jing-Yi Xue, Qi Xue, Yuan-Yuan Ding, Yu Li, Fu-Min Jin, Pujun Chen, Pei Chen, Yu |
description | One-dimensionally (1D) hollow noble meal nanotubes are attracting continuous attention because of their huge potential applications in catalysis and electrocatalysis. Herein, we successfully synthesize hollow iridium nanotubes (Ir NTs) with the rough porous surface by the 1-hydroxyethylidene-1, 1-diphosphonic acid-induced self-template method under hydrothermal conditions and investigate their electrocatalytic performance for oxygen evolution (OER) and nitrate reduction reactions (NO3 –RR) in an acidic electrolyte. The unique 1D and porous structure endow Ir NTs with big surface areas, high conductivity, and optimal atom utilization efficiency. Consequently, Ir NTs exhibit significantly enhanced activity and durability for acidic OERs compared with commercial Ir nanocrystals (Ir c-NCs), which only require the overpotential of 245 mV to deliver the current density of 10 mA cm–2. Meanwhile, Ir NTs also show higher electrocatalytic activity for NO3 –RR than that of Ir c-NCs, such as a Faraday efficiency of 84.7% and yield rate of 921 μg h–1 mgcat –1 for ammonia generation, suggesting that Ir NTs are universally advanced Ir-based electrocatalysts. |
doi_str_mv | 10.1021/acsami.0c01937 |
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Herein, we successfully synthesize hollow iridium nanotubes (Ir NTs) with the rough porous surface by the 1-hydroxyethylidene-1, 1-diphosphonic acid-induced self-template method under hydrothermal conditions and investigate their electrocatalytic performance for oxygen evolution (OER) and nitrate reduction reactions (NO3 –RR) in an acidic electrolyte. The unique 1D and porous structure endow Ir NTs with big surface areas, high conductivity, and optimal atom utilization efficiency. Consequently, Ir NTs exhibit significantly enhanced activity and durability for acidic OERs compared with commercial Ir nanocrystals (Ir c-NCs), which only require the overpotential of 245 mV to deliver the current density of 10 mA cm–2. Meanwhile, Ir NTs also show higher electrocatalytic activity for NO3 –RR than that of Ir c-NCs, such as a Faraday efficiency of 84.7% and yield rate of 921 μg h–1 mgcat –1 for ammonia generation, suggesting that Ir NTs are universally advanced Ir-based electrocatalysts.</description><identifier>ISSN: 1944-8244</identifier><identifier>EISSN: 1944-8252</identifier><identifier>DOI: 10.1021/acsami.0c01937</identifier><identifier>PMID: 32125818</identifier><language>eng</language><publisher>United States: American Chemical Society</publisher><ispartof>ACS applied materials & interfaces, 2020-03, Vol.12 (12), p.14064-14070</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a330t-8b674529b788d30c244fbe7ac467e99dc200fe33842cd7fa37f0f24b3b6f1b4c3</citedby><cites>FETCH-LOGICAL-a330t-8b674529b788d30c244fbe7ac467e99dc200fe33842cd7fa37f0f24b3b6f1b4c3</cites><orcidid>0000-0001-9545-6761 ; 0000-0002-3388-8929 ; 0000-0002-4317-3361</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/acsami.0c01937$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/acsami.0c01937$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,776,780,2751,27055,27903,27904,56716,56766</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/32125818$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Zhu, Jing-Yi</creatorcontrib><creatorcontrib>Xue, Qi</creatorcontrib><creatorcontrib>Xue, Yuan-Yuan</creatorcontrib><creatorcontrib>Ding, Yu</creatorcontrib><creatorcontrib>Li, Fu-Min</creatorcontrib><creatorcontrib>Jin, Pujun</creatorcontrib><creatorcontrib>Chen, Pei</creatorcontrib><creatorcontrib>Chen, Yu</creatorcontrib><title>Iridium Nanotubes as Bifunctional Electrocatalysts for Oxygen Evolution and Nitrate Reduction Reactions</title><title>ACS applied materials & interfaces</title><addtitle>ACS Appl. 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Mater. Interfaces</addtitle><date>2020-03-25</date><risdate>2020</risdate><volume>12</volume><issue>12</issue><spage>14064</spage><epage>14070</epage><pages>14064-14070</pages><issn>1944-8244</issn><eissn>1944-8252</eissn><abstract>One-dimensionally (1D) hollow noble meal nanotubes are attracting continuous attention because of their huge potential applications in catalysis and electrocatalysis. Herein, we successfully synthesize hollow iridium nanotubes (Ir NTs) with the rough porous surface by the 1-hydroxyethylidene-1, 1-diphosphonic acid-induced self-template method under hydrothermal conditions and investigate their electrocatalytic performance for oxygen evolution (OER) and nitrate reduction reactions (NO3 –RR) in an acidic electrolyte. The unique 1D and porous structure endow Ir NTs with big surface areas, high conductivity, and optimal atom utilization efficiency. Consequently, Ir NTs exhibit significantly enhanced activity and durability for acidic OERs compared with commercial Ir nanocrystals (Ir c-NCs), which only require the overpotential of 245 mV to deliver the current density of 10 mA cm–2. Meanwhile, Ir NTs also show higher electrocatalytic activity for NO3 –RR than that of Ir c-NCs, such as a Faraday efficiency of 84.7% and yield rate of 921 μg h–1 mgcat –1 for ammonia generation, suggesting that Ir NTs are universally advanced Ir-based electrocatalysts.</abstract><cop>United States</cop><pub>American Chemical Society</pub><pmid>32125818</pmid><doi>10.1021/acsami.0c01937</doi><tpages>7</tpages><orcidid>https://orcid.org/0000-0001-9545-6761</orcidid><orcidid>https://orcid.org/0000-0002-3388-8929</orcidid><orcidid>https://orcid.org/0000-0002-4317-3361</orcidid></addata></record> |
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title | Iridium Nanotubes as Bifunctional Electrocatalysts for Oxygen Evolution and Nitrate Reduction Reactions |
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