Hydrogen Sulfide (H2S) is the newest member in a group of biologically generated gaseous signaling molecules known as gasotransmitters. The main obstacle preventing the electrochemical detection of H2S in vivo is the kinetic limitation of the oxidation reaction, which results in interference from carbon monoxide and nitric oxide.  One possible solution to selectively detect H2S is to modify the electrode surface with an electrocatalyst that will preferably shift the oxidation potential of H2S allowing the reaction to occur at a lower potential than that needed to oxidize CO or NO.  This research focuses on electrodeposited dicyano-coordinated ferriprotoporphyrin (hemin) as an electrocatalyst capable of oxidizing H2S at 0.15 V vs. Ag/AgCl while achieving minimal response from CO or NO.  This presentation will introduce this novel material which currently is 100x to 1000x more sensitive towards H2S over CO and NO, respectively, while also showing the stability of the electrocatalyst response.

Dicyano-coordinated ferriprotoporphyrin for selective electrochemical oxidation of H<sub>2</sub>S under physical conditions

243rd National Meeting (2012)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.

Dicyano-coordinated ferriprotoporphyrin for selective electrochemical oxidation of H2S under physical conditions

Dicyano-coordinated ferriprotoporphyrin for selective electrochemical oxidation of H₂S under physical conditions