The authority – one of the key organisations behind the LoCity scheme and a FORS Gold operator – says it will no longer lease or purchase diesel models when replacing vehicles in its 300-strong fleet.
It is also encouraging businesses to limit deliveries in the Square Mile and is promoting the use of hybrid electric cars.
The move is the latest in the Corporation’s bid to clean up its fleet – it has already cut NOx emissions by 40% and PM by 50% since 2009.
The LoCity programme was launched at the start of this year and its aim to is reduce emissions from commercial vehicles.
Fergus Worthy, project manager for LoCity, says: “The City of London Corporation is leading the way in helping to reduce emissions and improve air quality for all Londoners, so we welcome its decision not to acquire any more diesel vehicles where a non-diesel alternative is available.
“As a LoCity Champion, the Corporation is setting a great example for other local authorities, businesses and operators to follow.”