In the first part of this talk I will first present our recent work on electro-reduction of CO2 (CO2RR) to high-value chemicals, a topic important to the environmental and energy landscapes. I will show approaches to enable Cu/CuOx based electrocatalyst achieving up to > 87-98 % Faradaic efficiency (FE) of CO2RR to formate or acetate in electrolytes under 58 atm high pressure CO2(g). In situ dynamic electrolytic speciation measurement techniques were developed to measure dissolved CO2(aq). In-situ Raman spectroscopy suggested the O-bound bidentate intermediate *OC•O* formed on active Cu(I) sites under high pressures as a precursor to formate or acetate. A novel approach of introducing a liquid CO2(l) layer at the interface of 58 atm CO2(g) and aqueous electrolyte by melting CO2(s) further increased CO2(aq) concentration and boosted CO2 reduction current density to the ~ 100 mA/cm2 level with a high FE. In the second part of the talk I will present our latest progress on developing high performance rechargeable Na/Cl2 and Li/Cl2 batteries, achieving specific capacities up to 5000 mAh/g operating down to -80 degree Celsius.
Prof. Dr. Hongjie Dai is the Jackson-Wood Professor of Chemistry at Stanford University. He has made fundamental contributions to nanosciences especially to novel carbon-based nanomaterials including carbon nanotubes and graphene nanoribbons. He pioneered nano-carbon biological and nanomedicine applications including imaging in the NIR-II/SWIR window. In the renewable energy area, he advanced new electrocatalysts for splitting fresh water and sea-water, and developed rechargeable aluminum-ion battery and Na/Cl2 and Li/Cl2 batteries.
Dai is a member of the US National Academy of Sciences, National Academy of Medicine, a fellow of the American Academy of Arts and Sciences and a foreign member of the Chinese Academy of Sciences. Dai received the APS James McGroddy Prize for New Materials, the ACS Pure Chemistry Award, the MRS Mid-Career Researcher Award, the NIH Director’s Pioneer Award, the Humboldt Research Award, and others.
In the first part of this talk I will first present our recent work on electro-reduction of CO2 (CO2RR) to high-value chemicals, a topic important to the environmental and energy landscapes. I will show approaches to enable Cu/CuOx based electrocatalyst achieving up to > 87-98 % Faradaic efficiency (FE) of CO2RR to formate or acetate in electrolytes under 58 atm high pressure CO2(g). In situ dynamic electrolytic speciation measurement techniques were developed to measure dissolved CO2(aq). In-situ Raman spectroscopy suggested the O-bound bidentate intermediate *OC•O* formed on active Cu(I) sites under high pressures as a precursor to formate or acetate. A novel approach of introducing a liquid CO2(l) layer at the interface of 58 atm CO2(g) and aqueous electrolyte by melting CO2(s) further increased CO2(aq) concentration and boosted CO2 reduction current density to the ~ 100 mA/cm2 level with a high FE. In the second part of the talk I will present our latest progress on developing high performance rechargeable Na/Cl2 and Li/Cl2 batteries, achieving specific capacities up to 5000 mAh/g operating down to -80 degree Celsius.
Prof. Dr. Hongjie Dai is the Jackson-Wood Professor of Chemistry at Stanford University. He has made fundamental contributions to nanosciences especially to novel carbon-based nanomaterials including carbon nanotubes and graphene nanoribbons. He pioneered nano-carbon biological and nanomedicine applications including imaging in the NIR-II/SWIR window. In the renewable energy area, he advanced new electrocatalysts for splitting fresh water and sea-water, and developed rechargeable aluminum-ion battery and Na/Cl2 and Li/Cl2 batteries.
Dai is a member of the US National Academy of Sciences, National Academy of Medicine, a fellow of the American Academy of Arts and Sciences and a foreign member of the Chinese Academy of Sciences. Dai received the APS James McGroddy Prize for New Materials, the ACS Pure Chemistry Award, the MRS Mid-Career Researcher Award, the NIH Director’s Pioneer Award, the Humboldt Research Award, and others.
