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MOS2 ÕâÖÖ²ÄÁÏ ÎÄÏ×Ö¸³öÆäfree energy of hydrogen adsorption  (¦¤GH) ½Ó½üÓÚÁ㣬ÀàËÆÓÚPt, ÏÔʾ³ö½ÏºÃµÄ²úÇâDZÁ¦¡£ÔÚPECÀïÃæ£¬ÓÐÎÄÏ×±¨µÀ¹ýMOS2/TIO2µÄÒìÖʽṹ×÷Ϊphotoanode, Ò²Óб¨µÀMoS2/P-semiconductor ×÷Ϊphotocathode¡£ÇëÎÊ£¬Èç¹ûMOS2ÓÃÔÚphotoanodeÉÏ£¬ÇâÆøÓ¦¸ÃÔÚcounter electrodeÉÏÎö³ö£¬ÕâÑùÆäÓÅÊÆ¦¤GH=0£¬ ÊDz»ÊÇû·¨·¢»Ó×÷Óã¿

»¹ÓиöÀàËÆµÄÎÊÌ⣬¹ØÓÚTafel plot¡£ÎÄÏ×Ö¸³ö ¡°Tafel plot is generally related to the catalytic mechanism of the electrode reaction. When the adsorbed hydrogen coverage (¦¨H) on catalysts is low, the Volmer reaction should possibly be the rate-limiting step with a theoretical Tafel slope of 120 mV/dec. For a high ¦¨H, a Heyrovsky or Tafel reaction should be usually the rate-determining step with a theoretical Tafel slope of 40 or 30 mV/dec, respectively.¡±
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¡°The Tafel slope of 86.3 mV/dec observed herein suggests that both the Volmer reaction, a discharge step that converted protons into absorbed hydrogen atoms on the catalyst surface, and the Heyrovsky reaction that involved the formation of surface-bound hydrogen molecules, played a significant role in determining the HER rate at the MoS2/G (2:5) framework electrode.¡±
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