| 1 | Rational design of robust iridium-ceria oxide-carbon nanofibers to boost oxygen evolution reaction in both alkaline and acidic media显示文摘Anodic oxygen evolution reaction(OER)is essential to participate in diverse renewable energy conversion and storage processes,while most OER electrocatalysts present satisfactory catalytic performance in only alkaline or acidic medium,limiting their practical applications in many aspects.Herein,we have designed and prepared Ir-CeO_(2)-C nanofibers(NFs)via an electrospinning and a relatively low-temperature calcination strategy for OER application in both alkaline and acidic conditions.Density functional theory(DFT)simulations demonstrate the high catalytic active sites of Ir atoms for OER,that the formation of Ir–O bonds at the interface between Ir and CeO_(2)can modulate the electron density of the relevant Ir atoms to promote the OER activity.In addition,the unique nanofibrous heterostructure increases the exposed active sites and promotes the electrical conductivity.Therefore,the prepared Ir-CeO_(2)-C nanofibrous catalyst delivers an excellent OER property in both alkaline and acidic solutions.Impressively,the overpotentials to reach 10 mA·cm^(−2)are only 279 and 283 mV in the alkaline and acidic electrolyte,respectively,with favorable long-term stabilities.In addition,the two-electrode overall water splitting set-ups equipped with Ir-CeO_(2)-C NFs as anode and commercial Pt/C as cathode provide a cell voltage of 1.54 and 1.53 V to drive 10 mA·cm^(−2)in the alkaline and acidic electrolyte,respectively,which are much lower than Pt/C||IrO_(2)and lots of transition metal oxides-based electrolyzers.This research presents an efficient means to design OER catalysts with superior properties in both alkaline and acidic solutions. | Xiaojie Chen Wenying Liao Mengxiao Zhong Junjie Chen Su Yan Weimo Li Ce Wang Wei Chen Xiaofeng Lu | 2023 | Nano Research2023，16，5： | 1 |
| 2 | Variability:Human nature and its impact on measurement and statistical analysis显示文摘The world is colorful,different,and diverse!So are humans.Human variability refers to the variability among individuals,which could be the variability of a human trait(e.g.,body fat percent),or the difference in the response of a trait to a simulation(e.g.,losing or not losing weight when facing the same intervention). | Heng Li Zezhao Chen Weimo Zhu | 2019 | Journal of Sport and Health Science2019，8，6： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员