An Efficient Anti‐poisoning Catalyst against SOx, NOx, and POx: P, N‐Doped Carbon for Oxygen Reduction in Acidic Media,Angewandte Chemie International Edition

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An Efficient Anti‐poisoning Catalyst against SOx, NOx, and POx: P, N‐Doped Carbon for Oxygen Reduction in Acidic Media
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2018-10-18 , DOI: 10.1002/anie.201808383
Tayyaba Najam ₁ , Syed Shoaib Ahmad Shah ₁ , Wei Ding ₁ , Jinxia Jiang ₁ , Li Jia ₁ , Wang Yao ₁ , Li Li ₁ , Zidong Wei ₁

Affiliation

Electrocatalysts are readily poisoned during the catalysis of the oxygen reduction reaction (ORR); even air containing traces of SO_x and/or NO_x significantly decrease the activity and the durability of H₂–O₂ fuel cells. Now, a metal‐free strategy is reported to develop an efficient anti‐poisoning ORR catalyst, which involves the pyrolysis of PDAP‐phytic acid super‐molecular aggregate (PPSA). The pyrolyzed co‐doped carbon acting as a metal‐free electrocatalyst shows an enhanced activity for ORR in acidic medium, even under poisoning conditions (SO_x, NO_x, and PO_x). Moreover, P‐doping also changes the ORR pathway by yielding less than 4 % of H₂O₂, indicating a four‐electron pathway whereas more than>20 % of H₂O₂ was recorded for N‐doped carbon synthesized from PDAP.

中文翻译：

一种有效的抗SOx，NOx和POx的中毒催化剂：P，N掺杂的碳，可在酸性介质中还原氧气

在氧还原反应（ORR）的催化过程中，电催化剂容易中毒。即使含有痕量的SO _x和/或NO _x的空气也会显着降低H ₂ –O ₂燃料电池的活性和耐久性。现在，据报道，无金属策略可开发出一种有效的抗毒ORR催化剂，该催化剂涉及PDAP-植酸超分子聚集体（PPSA）的热解。即使在中毒条件下（SO _x，NO _x和PO _x），热解共掺杂碳也可以作为无金属电催化剂，在酸性介质中对ORR表现出增强的活性。此外，P掺杂还通过产生少于4％的H _2来改变ORR途径O ₂，表明存在四电子路径，而记录到的由PDAP合成的N掺杂碳记录了超过20％的H ₂ O ₂。

更新日期：2018-10-18

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