{"id":27267,"date":"2015-07-29T04:10:52","date_gmt":"2015-07-29T02:10:52","guid":{"rendered":"https:\/\/rss.nova-institut.net\/public.php?url=http%3A%2F%2Fwww.biofuelsdigest.com%2Fbdigest%2F2015%2F07%2F27%2Felectrochemical-co2-conversion-powered-by-renewable-energy-gets-closer%2F"},"modified":"2021-09-09T21:44:25","modified_gmt":"2021-09-09T19:44:25","slug":"efficient-electrochemical-co2-conversion-powered-by-renewable-energy","status":"publish","type":"post","link":"https:\/\/renewable-carbon.eu\/news\/efficient-electrochemical-co2-conversion-powered-by-renewable-energy\/","title":{"rendered":"Efficient Electrochemical CO2<\/sub> Conversion Powered by Renewable Energy"},"content":{"rendered":"
\"Abstract<\/div>\n

The catalytic conversion of CO2<\/sub> into industrially relevant chemicals is one strategy for mitigating greenhouse gas emissions. Along these lines, electrochemical CO2<\/sub> conversion technologies are attractive because they can operate with high reaction rates at ambient conditions. However, electrochemical systems require electricity, and CO2<\/sub> conversion processes must integrate with carbon-free, renewable-energy sources to be viable on larger scales. We utilize Au25<\/sub> nanoclusters as renewably powered CO2<\/sub> conversion electrocatalysts with CO2<\/sub> \u2192 CO reaction rates between 400 and 800 L of CO2<\/sub> per<\/i> gram of catalytic metal per<\/i> hour and product selectivities between 80 and 95%. These performance metrics correspond to conversion rates approaching 0.8\u20131.6 kg of CO2<\/sub> per<\/i> gram of catalytic metal per<\/i> hour. We also present data showing CO2<\/sub> conversion rates and product selectivity strongly depend on catalyst loading. Optimized systems demonstrate stable operation and reaction turnover numbers (TONs) approaching 6 \u00d7 106<\/sup> molCO2<\/sub><\/sub> molcatalyst<\/sub>\u20131<\/sup> during a multiday (36 h total hours) CO2<\/sub> electrolysis experiment containing multiple start\/stop cycles. TONs between 1 \u00d7 106<\/sup> and 4 \u00d7 106<\/sup> molCO2<\/sub><\/sub> molcatalyst<\/sub>\u20131<\/sup> were obtained when our system was powered by consumer-grade renewable-energy sources. Daytime photovoltaic-powered CO2<\/sub> conversion was demonstrated for 12 h and we mimicked low-light or nighttime operation for 24 h with a solar-rechargeable battery. This proof-of-principle study provides some of the initial performance data necessary for assessing the scalability and technical viability of electrochemical CO2<\/sub> conversion technologies. Specifically, we show the following: (1) all electrochemical CO2<\/sub> conversion systems will produce a net increase in CO2<\/sub> emissions if they do not integrate with renewable-energy sources, (2) catalyst loading vs activity trends can be used to tune process rates and product distributions, and (3) state-of-the-art renewable-energy technologies are sufficient to power larger-scale, tonne per<\/i> day CO2<\/sub> conversion systems.<\/p>\n

\n
Douglas R. Kauffman<\/a> *<\/sup><\/a>\u2020<\/sup><\/span>, <\/span>Jay Thakkar<\/a> \u2020<\/sup><\/span>, <\/span>Rajan Siva<\/a> \u2020<\/sup><\/span>, <\/span>Christopher Matranga<\/a> \u2020<\/sup><\/span>, <\/span>Paul R. Ohodnicki<\/a> \u2020<\/sup><\/span>, <\/span>Chenjie Zeng<\/a> \u2021<\/sup><\/span>, and <\/span>Rongchao Jin<\/a> \u2021<\/sup><\/span><\/div>\n
\n
\u2020<\/sup> National Energy Technology Laboratory, United States Department of Energy<\/span>, Pittsburgh, Pennsylvania 15236, United States<\/span><\/div>\n
\u2021<\/sup> Department of Chemistry, Carnegie Mellon University<\/span>, Pittsburgh, Pennsylvania 15213, United States<\/span><\/div>\n<\/div>\n
ACS Appl. Mater. Interfaces<\/cite>, 2015<\/span>, 7<\/span> (28), pp 15626\u201315632<\/div>\n
DOI: <\/strong>10.1021\/acsami.5b04393<\/div>\n
Publication Date (Web): June 29, 2015<\/div>\n
Copyright \u00a9 2015 American Chemical Society<\/div>\n
*E-mail: Douglas.Kauffman@NETL.DOE.GOV<\/a>.<\/div>\n<\/div>\n
<\/div>\n","protected":false},"excerpt":{"rendered":"

In Colorado, a team of resaerchers led by Douglas R. Kauffman and including Jay Thakkar, Rajan Siva,…<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_robots_primary_cat":"","nova_meta_subtitle":"","footnotes":""},"categories":[5572,5571],"tags":[5817],"supplier":[2135,11236,5068],"class_list":["post-27267","post","type-post","status-publish","format-standard","hentry","category-bio-based","category-co2-based","tag-research","supplier-university-of-pittsburgh","supplier-u-s-department-of-energy","supplier-us-doe-national-energy-technology-laboratory"],"_links":{"self":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/27267","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/comments?post=27267"}],"version-history":[{"count":0,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/posts\/27267\/revisions"}],"wp:attachment":[{"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/media?parent=27267"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/categories?post=27267"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/tags?post=27267"},{"taxonomy":"supplier","embeddable":true,"href":"https:\/\/renewable-carbon.eu\/news\/wp-json\/wp\/v2\/supplier?post=27267"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}