SQL Last 24 Hours as Hour Range

DECLARE @minDateTime AS DATETIME = GETDATE()-1;
DECLARE @maxDateTime AS DATETIME = GETDATE();
WITH Dates_CTE AS (
  SELECT 
    @minDateTime AS Dates 
  UNION ALL 
  SELECT 
    DATEADD(hh, 1, Dates) 
  FROM 
    Dates_CTE 
  WHERE 
    Dates < @maxDateTime
) 
SELECT 
  TOP(24) CONVERT(
    VARCHAR(2), 
    Dates, 
    108
  ) + ':00 - ' + CONVERT(
    varchar(2), 
    DATEADD(HOUR, 1, Dates), 
    108
  ) + ':00' AS 'HourRange' 
FROM 
  Dates_CTE