1.析氧反应(OER)

• H₂O + * → OH_ads+ H⁺ + e^- 

• OH_ads→ O_ads + H⁺ + e^-

• O_ads+ H₂O → OOH_ads + H⁺+ e^-   

• OOH_ads→ O_2ads + H⁺ + e^-  

• O_2ads→ O₂ + *

• Overall: 2H₂O→ 4H⁺ + O₂+ 4e^-

• OH^-+ * → OH_ads + e^-

• OH_ads+ OH^- → O_ads + H₂O + e^-

• O_ads+ OH^- → OOH_ads + e^-

• OOH_ads+ OH^-→ O_2ads + H₂O + e^- 

• O_2ads→ O₂ + *

• Overall: 4OH^-→ 2H₂O + O₂ + 4e^- 

2.阴极析氢反应(HER)

• H₂O + e^-→ OH^- + H_ads (Volmer)   

• H_ads+ H₂O + e^- → OH^- +H₂ (Heyrovsky)

• or 2H_ads → H₂ (Tafel)

• H⁺+e^- + * → H_ads (Volmer)

• H_ads + H⁺+ e^- → H₂ (Heyrovsky)

• or 2H_ads → H₂ (Tafel)

3.电解水制氢所用催化剂

原文始发于微信公众号（艾邦氢科技网）：电解水制氢机理：析氧反应(OER)和析氢反应(HER)