02372nas a2200217   4500008004100000022001400041245011800055210006900173260000800242300001600250490000700266520156800273653001701841653003101858653002101889653003701910653003201947100002101979700003102000856012302031       2023                        eng d  a1944-824400aAlloying with Mn enhances the activity and durability of the CoPt catalyst toward the methanol oxidation reaction0 aAlloying with Mn enhances the activity and durability of the CoP  cMAY  a26554-265620 v153 a<p>
	To improve the catalytic performance and durability ofPt catalystsused for the methanol oxidation reaction (MOR) in direct methanolfuel cells (DMFCs), alloying of Pt with other transition metals suchas Ru, Co, Ni, and Fe is considered an effective approach. Despitethe significant progress made in the preparation of bimetallic alloysand their utilization for MOR, improving the activity and durabilityof the catalysts to make them commercially viable remains a stiffchallenge. In this work, trimetallic Pt100-x (MnCo)( x ) (16 &lt; x &lt; 41) catalysts were successfully synthesized via borohydridereduction followed by hydrothermal treatment at 150 &amp; DEG;C. The electrocatalyticperformance of the synthesized trimetallic Pt100-x (MnCo)( x ) (16 &lt; x &lt; 41) catalysts toward MOR was studied using cyclicvoltammetry and chronoamperometry. The results affirm that all Pt100-x (MnCo)( x ) (16 &lt; x &lt; 41) alloys have superior MOR activityand durability as compared to bimetallic PtCo alloys and commerciallyavailable Pt/C (comm. Pt/C) catalysts. Among all the compositionsstudied, the Pt60Mn1.7Co38.3/C catalystexhibited superior mass activity (1.3 and 1.9 times higher than thoseof Pt81Co19/C and comm. Pt/C, respectively)toward MOR. Furthermore, all the newly synthesized Pt100-x (MnCo)( x )/C (16 &lt; x &lt; 41) catalysts showed better CO tolerance when comparedwith comm. Pt/C. This improved performance of the Pt100-x (MnCo)( x )/C (16 &lt; x &lt; 41) catalyst can be attributed to the synergisticeffect of Co and Mn on the Pt lattice.</p>
10aCO tolerance10adirect methanol fuel cells10aelectrocatalysis10amethanol oxidation reaction(MOR)10atrimetallic alloy catalysts1 aDeshpande, Pooja1 aPrasad, Bhagavatula, L. V.  uhttp://library.ncl.res.in/content/alloying-mn-enhances-activity-and-durability-copt-catalyst-toward-methanol-oxidation02096nas a2200217   4500008004100000022001400041245014300055210006900198260000800267490000700275520126500282653002301547653001701570653003101587653002101618653003201639100002501671700002701696700003101723856012401754       2024                        eng d  a1615-684600aEstablishing a new efficiency descriptor for methanol oxidation reaction and its validation with commercially available Pt-based catalysts0 aEstablishing a new efficiency descriptor for methanol oxidation   cJUN0 v243 a<p>Direct methanol fuel cells (DMFCs) have received a lot of attention in recent years as promising technology for generating clean and efficient energy. In DMFC, the anode catalyst is a vital component because it is involved in the oxidation of methanol, which produces electrons that can be used as an energy source. Cyclic voltammetry (CV) is commonly used to test the characteristics of the electrode materials before they are employed in the actual fuel cell. Interestingly in the case of DMFCs CV also is a useful technique to obtain vital information about the performance and expected efficiency of the electrodes. In general, the CV of methanol electrooxidation for Pt-based catalysts has two peaks, If in the forward scan (anodic scan) and Ib in the backward scan (cathodic scan). The ratio of these two peaks (If/Ib) is the most commonly used criterion for investigating CO poisoning in catalysts. However, there is a great deal of ambiguity surrounding this criterion, owing to the genesis of Ib. Addressing this we present here a new criterion to evaluate the efficiency of the catalyst using the same CV technique. We validate this newly proposed criterion with commercial Pt/C (comm. Pt/C) and other commercially available alloy catalysts.</p>
10acatalyst poisoning10aCO tolerance10adirect methanol fuel cells10aelectrocatalysis10aMethanol oxidation reaction1 aDeshpande, Pooja, S.1 aRadhakrishnan, Thulasi1 aPrasad, Bhagavatula, L. V.  uhttp://library.ncl.res.in/content/establishing-new-efficiency-descriptor-methanol-oxidation-reaction-and-its-validation