【摘 要】
：
Problems associated with carbon support corrosion under operating fuel cell conditions require the iden-tification of alternative supports for platinum-based na
【机 构】
：
Faculty of Physical Chemistry,University of Belgrade,Studentski trg 12-16,11158 Belgrade,Serbia;CeFE
论文部分内容阅读
Problems associated with carbon support corrosion under operating fuel cell conditions require the iden-tification of alternative supports for platinum-based nanosized electrocatalysts.Platinum supported on manganese vanadate(Pt/MnV2O6)was prepared by microwave irradiation method and characterized using X-ray diffraction,Fourier-transform infrared spectroscopy,X-ray photoelectron spectroscopy,scan-ning electron microscopy with energy dispersive spectroscopy,and transmission electron microscopy.The borohydride oxidation reaction(BOR)on Pt/MnV2O6 was studied in highly alkaline media using voltammetry,chronoamperometry,and electrochemical impedance spectroscopy.BOR electrocatalytic activity of Pt/MnV2O6 was also compared with that of commercial Pt/C(46 wt％Pt)electrocatalyst.The apparent activation energy of BOR at Pt/MnV2O6 was estimated to be 32 kJ mol-1 and the order of reac-tion to be 0.51,indicating that borohydride hydrolysis proceeds in parallel with its oxidation.Long-term stability of Pt/MnV2O6 under BOR typical conditions was observed.A laboratory-scale direct borohydride fuel cell assembled with a Pt/MnV2O6 anode reached a specific power of274 W g-1.Experimental results on Pt/MnV2O6 were complemented by DFT calculations,which indicated good adherence of Pt to MnV2O6,beneficial for electrocatalyst stability.
其他文献
Developing highly active bifunctional electrocatalysts for oxygen evolution reaction(OER)and oxygen reduction reaction(ORR)is of great significance in energy co
MXenes are well known for their potential application in supercapacitors due to their high-rate intercalation pseudocapacitance and long cyclability.However,the
Organometallic halide perovskite materials make great achievements in optoelectronic fields,especially in solar cells,in which the organic cations contain amine
Interface engineering strategy shows great promise in promoting the reaction kinetic and cycling performance in the field of electrochemical energy storage appl
Lithium-ion batteries(LIBs)have been widely applied in portable electronic devices and electric vehicles.With the booming of the respective markets,a huge quant
The increasing demands of hydrogen and the recent discovery of large reserves of methane have prompted the conversion of methane to hydrogen.The challenges rais
Product selectivity control is attractive in Fischer-Tropsch(F-T)synthesis but it is still a challenge,because the F-T products follow the Anderson-Schulz-Flory
The emerging lead-free halide double perovskite solar cells have attracted widespread attentions due to their long-term stability and non-toxicity, but suffer from the low device performance. One efficiencylimiting factor is the improper contacts between
CeO2 decorated CoOx rod-like hybrid,supported onto holey reduced graphene (CoOx/CeO2/RGO) composite,was fabricated via a surfactant-assisted route.Its correspon
The conversion efficiencies reported for Tin(Sn)halide-based perovskite solar cells(PSCs)fall a large gap behind those of lead halide-based PSCs,mainly because