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| 1 | Boosting electrocatalytic activity for CO_(2) reduction on nitrogen-doped carbon catalysts by co-doping with phosphorus显示文摘Electrochemical reduction of CO_(2)(CERR)to value-added chemicals is an attractive strategy for greenhouse gas mitigation,and carbon recycles utilization.Conventional metal catalysts suffered from low durability and sluggish kinetics impede the practical application.On the other hand,doped carbon materials recently demonstrate superior catalytic performance in CERR,which shows the potential to diminish the problems of metal catalysts to some extent.Herein,we present the design and fabrication of nitrogen(N),phosphorus(P)co-doped metal-free carbon materials as an efficient and stable electrocatalyst for reduction of CO_(2) to CO,which exhibits an excellent performance with a high faradaic efficiency of 92%(-0.55 V vs.RHE)and up to 24 h stability.A series of characterizations including TEM and XPS verified that nitrogen and phosphorous are successfully incorporated into the carbon matrix.Moreover,the comparisons between co-doping and single doping catalysts reveal that co-doping can significantly increase CERR performance.The improved catalytic activity is attributed to the synergetic effects between nitrogen and phosphorous dopants,which effectively modulate properties of the active site.The density functional theory(DFT)calculations were also performed to understand the synergy effects of dopants.It is revealed that the phosphorous doping can significantly lower the Gibbs free energy of COOH^(*)formation.Moreover,the introduction of the second dopants phosphorous can reduce the reaction barrier along the reaction path and cause polarization of density of states at the Fermi level.These changes can greatly enhance the activity of the catalysts.From a combined experimental and computational exploration,current work provides valuable insights into the reaction mechanism of CERR on N,P co-doped carbon catalysts,and the influence from synergy effects between dopants,which paves the way for the rational design of novel metal-free catalysts for CO2 electro-reduction. | Shuo Chen Tianfu Liu Samson O.Olanrele Zan Lian Chaowei Si Zhimin Chen Bo Li | 2021 | Journal of Energy Chemistry2021，30，3： | 2 |
| 2 | The effect of loop electrosurgieal excision procedure on future pregnancy outcome显示文摘 | Samson SI Bentley LB Fahey TJ | | 0，，02： | 1 |
| 3 | Roles for common cytokine receptor gamma-chain-dependent cytokines in the generation,differentiation,and maturation of NK cell precursors and peripheral NK cells in vivo显示文摘 | Vosshenrich CA Ranson T Samson SI | 2005 | J Immunol2005，174，3： | 1 |
| 4 | The effect of loop elec- trosurgieal excisiob procedure on future pregnancy out- come 显示文摘 | Samson SI Bentley LB Fahey TJ | 2005 | Gynecology2005，105，2： | 1 |
| 5 | Roles for common cytokine receptor gamma-chain-dependent cytokines in the genera- tion, differentiation, and maturation of NK cell precursors and peripheral NK cells in vivo显示文摘 | Vosshenrich CA Ranson T Samson SI | 2005 | J Immunol2005，174，3： | 1 |
| 6 | Tuning of interactions between cathode and lithium polysulfide in Li-S battery by rational halogenation显示文摘Li-S batteries have aroused intense interests as one of the most promising high-energy-density storage technology.However,the complex undesired shuttle effect induced by dissolution and diffusion of lithium polysulfide intermediates remains the major setback of this technology.Chemical modification of carbon cathode through heteroatom-doping is widely accepted as an effective method to inhibit the shuttle effect in Li-S battery cathode.Herein,using first principle calculations,we systematically examined the interaction between halogenated graphene and lithium polysulfide species.It is found that the halogen dopants(F,Cl,Br,I)significantly modify the local electronic structure of adsorption site and further induce a polarization to trap the polysulfides.Interestingly,a concave curve is observed from F to I for lithium polysulfide adsorption rather than a linear relation.The exceptions demonstrated from iodine dopant is carefully analyzed and attributed to its unique charge state.Moreover,boron as second dopant further strengthens the interaction between halogenated graphene and polysulfide molecule.Based on halogenation strategy,lithium polysulfide/cathode interactions are tuned in a wide range,which can also be of great importance to accelerate redox reaction in Li-S battery.Overall,an effective method by halogenation is verified to regulate the adsorption of lithium polysulfide and also enhance the reaction kinetics of the Li-S battery system. | Samson O.Olanrele Zan Lian Chaowei Si Shuo Chen Bo Li | 2020 | Journal of Energy Chemistry2020，29，10： | 0 |
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